Butterflies are some of the most beautiful insect visitors to a garden. Moths and their caterpillars are crucial foods for birds, bats and other mammals, and adults are important pollinators of wild flowers and some trees. Butterflies need warmth to be active and fly, and they need to drink nectar for energy. Provide both. Leave a ‘wild area’ or plant wild plants. To provide a hiding place (for birthing) - hedge, ivy or fence.